Title: plugin causing error
Last modified: December 28, 2020

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# plugin causing error

 *  Resolved [ucarman2002](https://wordpress.org/support/users/ucarman2002/)
 * (@ucarman2002)
 * [5 years, 5 months ago](https://wordpress.org/support/topic/plugin-causing-error-4/)
 * when adding product to cart error page is displayed.
    Warning: Cannot modify 
   header information – headers already sent by (output started at /home/customer/
   www/justpanhead.com/public_html/wp-content/plugins/woo-auto-coupons/wac_functions.
   php:187) in /home/customer/www/justpanhead.com/public_html/wp-includes/pluggable.
   php on line 1296
 * if logged in product is added to cart
    If not logged in product is not added 
   to cart
 * tHANK YOU LF CLARK
 * The page I need help with: _[[log in](https://login.wordpress.org/?redirect_to=https%3A%2F%2Fwordpress.org%2Fsupport%2Ftopic%2Fplugin-causing-error-4%2F%3Foutput_format%3Dmd&locale=en_US)
   to see the link]_

Viewing 4 replies - 1 through 4 (of 4 total)

 *  Plugin Author [RLDD](https://wordpress.org/support/users/rermis/)
 * (@rermis)
 * [5 years, 5 months ago](https://wordpress.org/support/topic/plugin-causing-error-4/#post-13841552)
 * Hi Clark,
 *  I was able to reproduce this error. It is caused by the coupon plugin piggybacking
   on the add to cart action. Please expect a bug fix to be released within the 
   next 24 hours.
 * Thank you!
 *  Thread Starter [ucarman2002](https://wordpress.org/support/users/ucarman2002/)
 * (@ucarman2002)
 * [5 years, 5 months ago](https://wordpress.org/support/topic/plugin-causing-error-4/#post-13845721)
 * Hello,
 * Still have this issue after update to 1.3.9.
 * Thank you
 *  Plugin Author [RLDD](https://wordpress.org/support/users/rermis/)
 * (@rermis)
 * [5 years, 5 months ago](https://wordpress.org/support/topic/plugin-causing-error-4/#post-13845999)
 * I appreciate your persistence. I have not been able to reproduce this error after
   version 1.3.8, however I have moved some things around that could have caused
   this issue to persist in limited scenarios.
 * Upon update to version 1.3.10, please clear your server’s cache, and test for
   this issue in a private or incognito tab. Please let me know if it persists.
 *  Thread Starter [ucarman2002](https://wordpress.org/support/users/ucarman2002/)
 * (@ucarman2002)
 * [5 years, 5 months ago](https://wordpress.org/support/topic/plugin-causing-error-4/#post-13846151)
 * Hello,
    working perfectly now. Thank you for your quick responce.
 * Thank you

Viewing 4 replies - 1 through 4 (of 4 total)

The topic ‘plugin causing error’ is closed to new replies.

 * ![](https://ps.w.org/woo-auto-coupons/assets/icon-256x256.png?rev=3405507)
 * [Auto Coupons for WooCommerce](https://wordpress.org/plugins/woo-auto-coupons/)
 * [Frequently Asked Questions](https://wordpress.org/plugins/woo-auto-coupons/#faq)
 * [Support Threads](https://wordpress.org/support/plugin/woo-auto-coupons/)
 * [Active Topics](https://wordpress.org/support/plugin/woo-auto-coupons/active/)
 * [Unresolved Topics](https://wordpress.org/support/plugin/woo-auto-coupons/unresolved/)
 * [Reviews](https://wordpress.org/support/plugin/woo-auto-coupons/reviews/)

## Tags

 * [add to cart](https://wordpress.org/support/topic-tag/add-to-cart/)

 * 4 replies
 * 2 participants
 * Last reply from: [ucarman2002](https://wordpress.org/support/users/ucarman2002/)
 * Last activity: [5 years, 5 months ago](https://wordpress.org/support/topic/plugin-causing-error-4/#post-13846151)
 * Status: resolved